Insulator.



V PATENTBD Nov. 29, 19.04.

S. QAKMAN.

INSULATOE.

APPLIOATION FILED NOV.7,1903.

N0 MODEL.

EEEEIE:

UNITED STATES Patented November 29, 1904.

PATENT OFFICE.

SAMUEL OAKMAN, OF CHESHIRE, MASSACHUSETTS, ASSIGNOR TO LUTHER A. WRIGHT,OF BOSTON, MASSACHUSETTS.

INSULATOR.

SPECIFICATION forming part of Letters Patent No. 775,986, dated November29, 1904.

Application filed November 7, 1903. Serial No. 180,246. (No model.)

To a whom it Til/[by concern.-

Be it known that I, SAMUEL OAKMAN, a citizen of the United States,residing in Cheshire, in the county of Berkshire and State ofMassachusetts, have invented a new and useful Improvement in Insulators,of which the following, taken in connection with the accompanyingdrawings, is a specification.

My invention relates to that class of insulators that are used forinsulating suspended wires carrying electric currents; and it consistsin the peculiar arrangement and shape of the members of which it iscomposed, the object being to secure a better insulation. This object Iattain by the construction shown in the accompanying drawings, in whichFigure 1 is an elevation of one of my insulators. Fig. 2 is a verticalsection of the same. Fig. 3 is a plan of the same.

My insulator may be attached to the crossarm or any structure in theusual manner-- that is, by a pin and screw socket S or by any suitablemeans. It should be so far above its supporting structure that the underor interior surface H of the insulator shall be readily accessible tothe hand, so that the caretaker may without trouble renew the insulatingcoating of paraflin or other substance that may he required.

The Wire-holding members of the insulator consist of the members E andE, which overhangthe lower part of the wire recess C, and thus formwedge-like lateral wire-receptacles D and D, so that when the wire isresting upon the insulator it can be drawn or will of its own accordenter one of the side receptaales, and thus be held automatically,although as a matter of additional security a tie-wire may be used, saidtie-wire passingaround the lower part of one of the members E or E.

The protecting-shield member B surrounds the socket-piece S and with itforms the annular chamber H. The shield member connects with the body ofthe insulator and extends downward and outward. Its lower rim at B ispractically horizontal and spreads so as to cover a comparatively largearea and thus to thoroughly protect the socket-piece S and the screwpin. It also forms a broad shallow chamber H, the walls of which arecoated with paraflin or its equivalent. The chamber H is broad andshallow, so that its interior coating of paraflin or the like may bereadily applied and renewed.

I claim An electric insulator of this class having a protecting-shieldentirely surrounding the body of the insulator and extending downwardand outwardly until its outer rim becomes practically horizontal,whereby a broad annular chamber is formed for receiving paraffin orother coating, substantially as and for the purpose set forth.

In testimony whereoi'I have signed my name to this specification, in thepresence of two subscribing witnesses, on this 5th day of N ovemher, A.D. 1903.

SAMUEL OAKMAN.

l/Vitnesses:

F. C. BROWN, Mrs. J. RoFENoLn.

